4406621 has 4 divisors (see below), whose sum is σ = 4665852. Its totient is φ = 4147392.

The previous prime is 4406599. The next prime is 4406627. The reversal of 4406621 is 1266044.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2992900 + 1413721 = 1730^2 + 1189^2 .

It is a cyclic number.

It is not a de Polignac number, because 4406621 - 2¹⁴ = 4390237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4406627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129590 + ... + 129623.

It is an arithmetic number, because the mean of its divisors is an integer number (1166463).

Almost surely, 2^4406621 is an apocalyptic number.

It is an amenable number.

4406621 is a deficient number, since it is larger than the sum of its proper divisors (259231).

4406621 is a wasteful number, since it uses less digits than its factorization.

4406621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259230.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 4406621 is about 2099.1953220222. The cubic root of 4406621 is about 163.9464057476.

The spelling of 4406621 in words is "four million, four hundred six thousand, six hundred twenty-one".